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Note 34
 6 Months Ended
Jun. 30, 2021
Share of profit or loss of entities accounted for using the equity method [Abstract]  
Disclosure of share of profit or loss of entities accounted for using the equity method [Text Block] Share of profit or loss of entities accounted for using the equity method Results from “Share of profit or loss of entities accounted for using the equity method” resulted in a loss of €5 million for the six months ended June 30, 2021, compared with the loss of €17 million recorded for the six months ended June 30, 2020.